Package org.apache.drill.exec.vector.complex.fn

Class FieldSelection

java.lang.Object

org.apache.drill.exec.vector.complex.fn.FieldSelection

public class FieldSelection
extends Object

This class manages the projection pushdown for a complex path.

Field Summary

Fields

Modifier and Type	Field	Description
static final FieldSelection	ALL_VALID
static final FieldSelection	INVALID_NODE

Method Summary

Modifier and Type	Method	Description
FieldSelection	getChild(String name)
static FieldSelection	getFieldSelection(List<SchemaPath> fields)	Generates a field selection based on a list of fields.
boolean	isAlwaysValid()
boolean	isNeverValid()
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

INVALID_NODE

public static final FieldSelection INVALID_NODE

ALL_VALID

public static final FieldSelection ALL_VALID

Method Details

toString

public String toString()

Overrides:

toString in class Object

isNeverValid

public boolean isNeverValid()

isAlwaysValid

public boolean isAlwaysValid()

getChild

public FieldSelection getChild(String name)

getFieldSelection

public static FieldSelection getFieldSelection(List<SchemaPath> fields)

Generates a field selection based on a list of fields. Assumes that a partial path a.b is equivalent to a.b.*

Parameters:

fields -

Returns: